Another tip for persons in the future who, for some reason, end up in possession of a #Buffalo #TeraStation #NAS running software last released in 2015:
To mount a #Samba share from the TS3400 on a modern #Linux machine, you need to explicitly provide the "vers=2.0" to mount.cifs, or add it to your fstab options.
Not doing this will result in a very nonspecific "cifs_mount failed w/return code = -22" error message.
Ref: https://stackoverflow.com/questions/6734400/what-does-cifs-mount-failed-w-return-code-22-indicate